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Absolute measurement of the transient optical nonlinearity in N2, O2, N2O, and Ar

被引：99
|
作者：
Wahlstrand, J. K. [1 ]
Cheng, Y. -H. [1 ]
Milchberg, H. M. [1 ]
机构：
[1] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA
来源：
PHYSICAL REVIEW A | 2012年 / 85卷 / 04期
基金：
美国国家科学基金会;
关键词：
REFRACTIVE-INDEX; SINGLE-SHOT; FEMTOSECOND PULSES; LASER-PULSES; ULTRA-SHORT; AIR; COMPRESSION; MOLECULES; GASES; LIGHT;
D O I：
10.1103/PhysRevA.85.043820
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The absolute time-dependent nonlinear response of O-2, N-2, N2O, and Ar to intense nonionizing, ultrashort optical pump pulses ismeasured with single-shot spectral interferometry. The instantaneous and delayed rotational responses are distinguished as a function of pump-pulse duration and probe central wavelength. Our measurements are central to the modeling and understanding of nonlinear propagation of intense ultrashort laser pulses in gases.
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页数：5
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